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USGS1980

Children and the San Fernando earthquake

Before dawn, on February 9, 1971, a magnitude 6.4 earthquake occurred in the San Fernando Valley of California. On the following day, theSan Fernando Valley Child Guidance Clinic, through radio and newspapers, offered mental health crises services to children frightened by the earthquake. Response to this invitation was immediate and almost overwhelming. During the first 2 weeks, the Clinic's staff counseled hundreds of children who were experiencing various degrees of anxiety.

Earthquake Information Bulletin (USGS)↗

USGS1984

Volcanic studies at the David A. Johnston Cascades Volcano Observatory.

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Earthquake Information Bulletin (USGS)↗

USGS1977

Remote sensing for lineaments in the Mississippi Embayment

A recurrence of an 1811-12 type earthquake in the Mississippi Valley would pose severe problems to construction in the valley. As William Stauder has stated in the preceding article, a particular difficulty in understanding the seismicity of this area is that, whereas various surface manifestations of the 1811-12 earthquakes have been well documented (for example, sandblows and sunken lands), active fault zones have never been recognized. There may be different reasons for this.

Mississippi embayment↗

USGS1975

The seismic history of the Rio Grande Rift

The Rio Grande Rift, one of the major geologic structures of the Southwest, cuts through the center of New Mexico from north to south. The rift is also referred to as the Rio Grande Trench and as the Rio Grande Trough. It extends from the northern end of the San Luis Valley in Colorado southward 725 kilometres along the course of the Rio Grande River through New Mexico to near El Paso, Tex. The Rio Grande Rift is not a single trough but a series of north-trending basins arranged en echelon and separated by narrow constrictions or channels. The rift follows the western flank of the southern Rocky Mountains and apparently was formed at the same time as the moutains.

Rio Grande↗

USGS1979

Computers at the Albuquerque Seismological Laboratory

The Worldwide Standardized Seismograph Network (WWSSN) is managed by the U.S Geological Survey in Albuquerque, N. Mex. It consists of a global network of seismographs housed in seismic observatories throughout the world. An important recent addition to this network are the Seismic Research Observatories (SRO) which combine a borehole seismometer with a modern digital data recording system.

Earthquake Information Bulletin (USGS)↗

USGS1976

The San Francisco cow; did she or didn’t she?

No one has suggested that Mr. Shafter's nameless cow was the cause of the 1906 earthquake, but she has been the source of as persistent a rumor as Mrs. Murphy's Chicago cow. Since 1906, "the cow that fell in the crack" has been a favorite subject of humorous speculation. large earthquakes have always produced large exaggerations, and, although it is difficult to exaggerate the terror humans feel in an earthquake, many scientists have said that much of what witnesses said they witnessed they did not witness at all. Huge, gaping cracks that legend says open and close in the earth, swallowing whole cities, are among those earthquake features that just aren't featured in earthquakes. True, soil may "snap open and shut," but most earth scientists do not think that the cracks are wide enough or deep enough to accommodate houses.

Earthquake Information Bulletin (USGS)↗

USGS1976

Earthquake watch

When the time comes that earthquakes can be predicted accurately, what shall we do with the knowledge? This was the theme of a November 1975 conference on earthquake warning and response held in San Francisco called by Assistant Secretary of the Interior Jack W. Carlson. Invited were officials of State and local governments from Alaska, California, Hawaii, Idaho, Montana, Nevada, utah, Washington, and Wyoming and representatives of the news media.

Earthquake Information Bulletin (USGS)↗

USGS1976